The reliability of achromatic displays is island‐dependent in nocturnal Storm Petrels

  title={The reliability of achromatic displays is island‐dependent in nocturnal Storm Petrels},
  author={Camilla Soravia and Felipe Aguado-Gim{\'e}nez and Jes{\'u}s Miguel Avil{\'e}s},
Nocturnal birds rely on achromatic visual signals to assess rivals and potential mates, but variation in the expression of these displays has been understudied. Here we use UV‐visible reflectance spectrometry to study colour variation and the potential signalling function of the dark brown chest and white rump plumage – a colour pattern conspicuously exhibited during twilight courtship displays – in nocturnal Mediterranean Storm Petrels Hydrobates pelagicus melitensis from three islands with… 


A Natural Experiment on the Condition-Dependence of Achromatic Plumage Reflectance in Black-Capped Chickadees
Data provide strong evidence that black and white color is an honest indicator in chickadees, and that variation in feather dirtiness, likely due to differences in preening behavior is a mechanism for this association.
The importance of visual cues for nocturnal species: eagle owls signal by badge brightness
The results indicate that the white badge of eagle owls plays an important role in visual communication during contests, and suggests the need to convey information by visual communication in a nocturnal species may have promoted the evolution of visual signals employed at crepuscule.
Colour also matters for nocturnal birds: owlet bill coloration advertises quality and influences parental feeding behaviour in little owls
It is confirmed that parent little owls use bill coloration to reveal information on owlet body mass to adjust their feeding strategies, thus highlighting the importance of considering potential chromatic signals for a full comprehension of parent–offspring communication processes in nocturnal bird species.
Brightness Features of Visual Signaling Traits in Young and Adult Eurasian Eagle-Owls
The results showed that the total reflectance of young birds' white feathers differed significantly from that of adult owls'white feathers; the brightness differed between the sexes in adults only, with females showing a significantly higher reflectance than males; and the total reflective patch around a young bird's mouth was positively correlated with bro...
The importance of visual cues for nocturnal species: Eagle owl fledglings signal with white mouth feathers
Brightnessdependent reactions of parent owls suggest that visual signalling may be more widely employed than previously thought, and studying birds at night may reveal sophisticated strategies of animal communication.
Effects of nestling condition on UV plumage traits in blue tits: an experimental approach
The data suggest that there is a sex-specific effect on the blue but not the yellow plumage and that this is related to differences in the signaling function of both plumage traits.
Brightness variability in the white badge of the eagle owl Bubo bubo
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Moult speed affects structural feather ornaments in the blue tit
The trade‐off between fast moulting and structural colour expression may represent a previously unrecognized selective advantage for early‐breeding birds.
The importance of white on black: unmelanized plumage proportion predicts display complexity in birds
  • I. Galván
  • Biology
    Behavioral Ecology and Sociobiology
  • 2008
It is hypothesized that, given that the efficacy of visual displays basically depends on conspicuousness and level of performance, species with low levels of conspicuousness may be forced to perform more complex varieties of a given display to get the same signal efficiency than other more conspicuous species.
Simultaneous Crypsis and Conspicuousness in Color Patterns: Comparative Analysis of a Neotropical Rainforest Bird Community
It is shown that canopy and understory act as distinct selective regimes that strongly influence bird coloration, and the evolution of color patterns for all organisms living in contrasted light environments is of general interest.